1
0
Fork 0
mirror of https://github.com/tobast/libunwind-eh_elf.git synced 2024-12-25 12:33:42 +01:00

Add a test to catch calls to calloc from libunwind

We'd like to avoid calls to all malloc related functions
so libunwind is still usable from such allocators.

Signed-off-by: Paul Pluzhnikov <ppluzhnikov@google.com>
This commit is contained in:
Arun Sharma 2011-04-05 20:46:24 -07:00
parent 4dc222cf8a
commit d86155f72e
4 changed files with 148 additions and 2 deletions

1
.gitignore vendored
View file

@ -35,6 +35,7 @@ tests/[GL]test-init
tests/[GL]test-resume-sig
tests/[GL]perf-simple
tests/Ltest-nomalloc
tests/Ltest-nocalloc
tests/Lperf-simple
tests/check-namespace.sh
tests/forker

137
tests/Gtest-nocalloc.c Normal file
View file

@ -0,0 +1,137 @@
/* libunwind - a platform-independent unwind library
Copyright (C) 2011 Google, Inc
Contributed by Paul Pluzhnikov <ppluzhnikov@google.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <execinfo.h> /* for backtrace */
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <pthread.h>
#include <libunwind.h>
#define panic(args...) \
{ fprintf (stderr, args); exit (-1); }
int verbose;
int num_mallocs;
int num_callocs;
int in_unwind;
void *
calloc(size_t n, size_t s)
{
static void * (*func)();
#ifdef __GLIBC__
/* In glibc, dlsym() calls calloc. Calling dlsym(RTLD_NEXT, "calloc") here
causes infinite recursion. Instead, we simply use it by its other
name. */
extern void *__libc_calloc();
func = &__libc_calloc;
#else
if(!func)
func = (void *(*)()) dlsym(RTLD_NEXT, "calloc");
#endif
if (in_unwind) {
num_callocs++;
return NULL;
} else {
return func(n, s);
}
}
void *
malloc(size_t s)
{
static void * (*func)();
if(!func)
func = (void *(*)()) dlsym(RTLD_NEXT, "malloc");
if (in_unwind) {
num_mallocs++;
return NULL;
} else {
return func(s);
}
}
static void
do_backtrace (void)
{
const int num_levels = 100;
void *pc[num_levels];
in_unwind = 1;
backtrace(pc, num_levels);
in_unwind = 0;
}
void
foo3 ()
{
do_backtrace ();
}
void
foo2 ()
{
foo3 ();
}
void
foo1 (void)
{
foo2 ();
return NULL;
}
int
main (int argc, char **argv)
{
int i, num_errors;
/* Create (and leak) 100 TSDs, then call backtrace()
and check that it doesn't call malloc()/calloc(). */
for (i = 0; i < 100; ++i) {
pthread_key_t key;
if (pthread_key_create (&key, NULL))
panic ("FAILURE: unable to create key %d\n", i);
}
foo1 ();
num_errors = num_mallocs + num_callocs;
if (num_errors > 0)
{
fprintf (stderr,
"FAILURE: detected %d error%s (malloc: %d, calloc: %d)\n",
num_errors, num_errors > 1 ? "s" : "",
num_mallocs, num_callocs);
exit (-1);
}
return 0;
}

5
tests/Ltest-nocalloc.c Normal file
View file

@ -0,0 +1,5 @@
#define UNW_LOCAL_ONLY
#include <libunwind.h>
#if !defined(UNW_REMOTE_ONLY)
#include "Gtest-nocalloc.c"
#endif

View file

@ -1,7 +1,8 @@
AM_CPPFLAGS = -I$(top_srcdir)/include
EXTRA_DIST = run-ia64-test-dyn1 run-ptrace-mapper run-ptrace-misc \
run-check-namespace check-namespace.sh.in Gtest-nomalloc.c
run-check-namespace check-namespace.sh.in Gtest-nomalloc.c \
Gtest-nocalloc.c
MAINTAINERCLEANFILES = Makefile.in
@ -44,7 +45,7 @@ endif #ARCH_IA64
Gtest-trace Ltest-trace \
test-async-sig test-flush-cache test-init-remote \
test-mem test-setjmp test-ptrace \
Ltest-nomalloc rs-race
Ltest-nomalloc Ltest-nocalloc rs-race
noinst_PROGRAMS_cdep = forker mapper test-ptrace-misc test-varargs \
Gperf-simple Lperf-simple \
Gperf-trace Lperf-trace
@ -102,6 +103,7 @@ Gtest_bt_SOURCES = Gtest-bt.c ident.c
Ltest_bt_SOURCES = Ltest-bt.c ident.c
test_ptrace_misc_SOURCES = test-ptrace-misc.c ident.c
Ltest_nomalloc_SOURCES = Ltest-nomalloc.c
Ltest_nocalloc_SOURCES = Ltest-nocalloc.c
Gtest_trace_SOURCES = Gtest-trace.c ident.c
Ltest_trace_SOURCES = Ltest-trace.c ident.c
@ -148,6 +150,7 @@ Ltest_dyn1_LDADD = $(LIBUNWIND_local)
Ltest_exc_LDADD = $(LIBUNWIND_local)
Ltest_init_LDADD = $(LIBUNWIND_local)
Ltest_nomalloc_LDADD = $(LIBUNWIND_local) @DLLIB@
Ltest_nocalloc_LDADD = $(LIBUNWIND_local) @DLLIB@ -lpthread
Ltest_resume_sig_LDADD = $(LIBUNWIND)
Lperf_simple_LDADD = $(LIBUNWIND_local)
Ltest_trace_LDADD = $(LIBUNWIND_local)